CN220306423U

CN220306423U - Battery module, battery pack and vehicle

Info

Publication number: CN220306423U
Application number: CN202321805762.XU
Authority: CN
Inventors: 魏鑫; 罗超; 高永康
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2023-07-10
Filing date: 2023-07-10
Publication date: 2024-01-05
Anticipated expiration: 2033-07-10

Abstract

The utility model provides a battery module, a battery pack and a vehicle, wherein the battery module comprises a battery cell unit, module end plates arranged on two sides of the battery cell unit, and a mounting bracket and a crumple part arranged on the module end plates; an accommodating space is formed between the mounting bracket and the battery cell unit, the crumple part stretches into the accommodating space, and when the mounting bracket is subjected to external impact, the crumple part can be impacted, so that the crumple part crumples. According to the battery module, the crumple part is arranged and can crumple under the impact of the mounting bracket, so that the energy of external impact can be absorbed conveniently, the effect of external impact on the battery cell unit is weakened, the deformation of the battery cell on the battery cell unit, particularly the deformation of the battery cell at the module end plates of the battery cell unit, which are close to two sides, is reduced, and the battery cell unit is protected better.

Description

Battery module, battery pack and vehicle

Technical Field

The utility model relates to the technical field of power batteries, in particular to a battery module. Meanwhile, the utility model also relates to a battery pack and a vehicle.

Background

In the existing CTB (Cell to Body) solution design, the battery pack acts as the chassis of the whole vehicle, in direct contact with the external environment. Because the vehicle bottom working condition is extremely complicated, for example, when a pit, a bulge or a stone road surface is skipped, the vehicle bottom is extremely easy to strike and scratch, so that the bottom of the battery pack is easily struck and scratched. However, the structure of the conventional battery module is limited, and after the battery module is mounted in the battery pack, deformation of the internal battery cells is easily caused when the bottom of the battery pack, particularly, the position where the bottom of the battery pack is connected with the end plate of the battery module is impacted, so that adverse effects are generated on normal use of the battery pack and safety performance of a vehicle.

Disclosure of Invention

In view of the above, the present utility model is directed to a battery module mounting structure to reduce the effect of external impact on the battery cells.

In order to achieve the above purpose, the technical scheme of the utility model is realized as follows:

a battery module comprises a battery cell unit, module end plates arranged on two sides of the battery cell unit, and a mounting bracket and a crumple part arranged on the module end plates;

an accommodating space is formed between the mounting bracket and the battery cell unit, and the crumple part stretches into the accommodating space, and can strike the crumple part and crumple the crumple part when the mounting bracket is subjected to external impact.

Further, the crush portion extends along a length of the module end plate;

the cross section of the crumple part is L-shaped, the crumple part comprises a vertical part and a horizontal part, the vertical part is connected with the module end plate, and the horizontal part is connected with one end of the vertical part far away from the module end plate and extends towards the direction of the battery cell unit.

Further, the crush part is provided with a notch for dividing the crush part into a plurality of crush sections which are arranged at intervals along the length direction of the module end plate.

Further, a weight reduction groove is formed in one side, far away from the battery cell unit, of the module end plate.

Further, transverse reinforcing ribs and/or longitudinal reinforcing ribs are arranged in the weight reducing groove;

the transverse reinforcing ribs extend along the length direction of the end plate, and the longitudinal reinforcing ribs extend along the height direction of the end plate.

Further, the battery cell unit comprises a plurality of battery cells which are sequentially arranged;

and a first buffer layer is arranged between two adjacent battery cells, and/or a second buffer layer is arranged between the module end plate and the battery cell unit.

Compared with the prior art, the utility model has the following advantages:

according to the battery module, the crumple part is arranged and can crumple under the impact of the mounting bracket, so that the energy of external impact can be absorbed conveniently, the effect of external impact on the battery cell unit is weakened, the deformation of the battery cell on the battery cell unit, particularly the deformation of the battery cell at the module end plates of the battery cell unit, which are close to two sides, is reduced, and the battery cell unit is protected better.

In addition, through dividing the portion of collapsing into a plurality of sections of collapsing of arranging along the length direction interval of module end plate, do benefit to the destruction scope that reduces external impact, when reducing the influence to the electric core unit, make things convenient for subsequent restoration.

In addition, the weight of the module end plate is reduced by the weight reducing groove. And the structural strength of the module end plate can be ensured by arranging the transverse reinforcing ribs and the longitudinal reinforcing ribs in the weight reducing grooves.

Another object of the present utility model is to provide a battery pack, in which the battery module as described above is provided, and the mounting bracket is connected with the lower case of the battery pack.

Further, a third buffer layer is arranged between the battery cell unit and the lower shell.

Further, the third buffer layer is an EPP material layer.

According to the battery pack, the battery module is arranged, so that the impact resistance of the battery pack and the safety performance of the battery pack are improved conveniently.

In addition, through being provided with the third buffer layer, can effectively absorb the load vibration that is transmitted by lower casing to better play the guard action to electric core unit.

The utility model also provides a vehicle provided with the battery pack.

The vehicle provided by the utility model is beneficial to improving the safety performance of the vehicle and the satisfaction degree of customers on the vehicle by the battery pack.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

fig. 1 is a schematic view illustrating a structure in which a battery module according to an embodiment of the present utility model is mounted on a lower case;

FIG. 2 is an enlarged view of portion A of FIG. 1;

FIG. 3 is a schematic view of a module end plate according to an embodiment of the present utility model;

fig. 4 is a schematic view illustrating a part of a structure of a battery pack according to an embodiment of the present utility model.

Reference numerals illustrate:

1. a module end plate; 2. a cell unit; 3. a mounting bracket; 4. an accommodation space; 5. a crush section; 501. a vertical portion; 502. a horizontal portion; 6. a crush cell; 7. a notch; 8. a second buffer layer; 9. a third buffer layer; 10. a nut; 11. a long bolt; 12. a weight reduction groove; 13. transverse reinforcing ribs; 14. longitudinal reinforcing ribs; 15. an avoidance groove; 16. and a lower housing.

Detailed Description

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.

In the description of the present utility model, it should be noted that, if terms indicating an orientation or positional relationship such as "upper", "lower", "inner", "outer", etc. are presented, they are based on the orientation or positional relationship shown in the drawings, only for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, if any, are also used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, in the description of the present utility model, the terms "mounted," "connected," and "connected," are to be construed broadly, unless otherwise specifically defined. For example, the connection can be fixed connection, detachable connection or integrated connection; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art in combination with specific cases.

The utility model will be described in detail below with reference to the drawings in connection with embodiments.

Example 1

The embodiment relates to a battery module, which integrally comprises a battery cell unit 2, module end plates 1 arranged on two sides of the battery cell unit 2, and a mounting bracket 3 and a crumple 5 arranged on the module end plates 1. And an accommodating space 4 is formed between the mounting bracket 3 and the battery cell unit 2, and the crumple portion 5 extends into the accommodating space 4, and when the mounting bracket 3 receives external impact, the crumple portion 5 can be impacted, and the crumple portion 5 crumples.

It can be understood that by being provided with the crumple 5 and enabling the crumple 5 to crumple under the impact of the mounting bracket 3, the energy of external impact can be absorbed well, so that the effect of external impact on the cell unit 2 is weakened, the deformation of the cell on the cell unit 2, especially the cell at the die set end plates 1 near two sides of the cell unit 2, is reduced, and the cell unit 2 is protected better.

Based on the above overall description, an exemplary structure of the present embodiment is shown in fig. 1 to 4. In this embodiment, the crush part 5 extends along the length direction of the module end plate 1, the cross section of the crush part 5 is in an "L" shape, and the crush part 5 includes a vertical portion 501 and a horizontal portion 502, the vertical portion 501 is connected with the module end plate 1, and the horizontal portion 502 is connected at one end of the vertical portion 501 far from the module end plate 1 and extends toward the cell unit 2.

It will be appreciated that by having crush section 5 include vertical portion 501 and horizontal portion 502 as shown in fig. 1 and 2, the bottom surfaces of vertical portion 501, horizontal portion 502 and module end plate 1 can be co-contoured with crush slots 6, thereby facilitating crush section 5 to be broken away in the direction of crush slots 6 upon impact by mounting bracket 3, and facilitating better absorption of external impact energy through crush. And the arrangement of the vertical part 501 and the horizontal part 502 can absorb the impact from the side part and the bottom part respectively, thereby better protecting the battery cells.

It should be noted that, the structure of the mounting bracket 3 in this embodiment may be set according to specific mounting requirements, as shown in fig. 1, 2 and 4, the mounting bracket 3 may extend along the length direction of the module end plate 1, the cross section of the mounting bracket 3 may be shaped like a Chinese character 'ji', and when in mounting, the nut 10 may be welded on the module end plate 1, and the long bolt 11 may pass through the module end plate 1 and the mounting bracket 3 and then be connected with the nut 10, so as to realize connection between the module end plate 1 and the mounting bracket 3.

Of course, the structure of the mounting bracket 3 indicated in the present embodiment is merely a preferred embodiment, and the mounting bracket 3 may be provided in other forms, so that the connection with the module end plate 1 is facilitated, and the accommodating space 4 into which the crush portion 5 extends may be formed between the mounting bracket 3 and the cell unit 2.

In this embodiment, the crush zone 5 is provided with notches 7, and the notches 7 are used to divide the crush zone 5 into a plurality of crush segments arranged at intervals along the longitudinal direction of the module end plate 1. It can be understood that by dividing the crumple 5 into a plurality of crumple sections arranged at intervals along the length direction of the module end plate 1, when the mounting bracket 3 is impacted externally, only the crumple sections corresponding to the positions of the mounting bracket 3 impacted externally are crumpled, so that the crumple sections at other positions are prevented from being influenced, the damage range is reduced, the influence on the battery cell unit 2 is reduced, and the subsequent repair is facilitated.

In particular, as shown in fig. 3, in this embodiment, two notches 7 are provided in the crush portion 5. Of course, the number of the notches 7 is not limited to two, but may be three, four, five, or the like. In addition, as shown in fig. 3 and 4, the position of the mounting bracket 3 welded with the bolts is usually arched to two sides along the thickness direction of the module end plate 1, so that the structural strength of the position can be improved while the welding operation is convenient. The arrangement is convenient, and an avoiding groove 15 for avoiding the arching position on the mounting bracket 3 can be arranged on the crumple part 5.

In addition, as a preferred embodiment, a weight-reducing groove 12 is provided on the side of the module end plate 1 away from the battery cell unit 2, so as to facilitate reducing the weight of the module end plate 1. In addition, as shown in fig. 3, a transverse reinforcing rib 13 and a longitudinal reinforcing rib 14 may be further disposed in the weight-reducing groove 12, the transverse reinforcing rib 13 extends along the length direction of the end plate, the longitudinal reinforcing rib 14 extends along the height direction of the end plate, so as to facilitate the improvement of the structural strength of the module end plate 1, and in a specific implementation, the transverse reinforcing rib 13 and the longitudinal reinforcing rib 14 may be a plurality of arranged at intervals.

Of course, the provision of both the transverse ribs 13 and the longitudinal ribs 14 is only a preferred embodiment in the present embodiment, and it is also possible to provide only the transverse ribs 13 or only the longitudinal ribs 14. In addition, as also shown in fig. 3, according to the arrangement requirements of other parts around the battery module at the time of arrangement, snap grooves and bolt holes may be provided on the module end plate 1 to facilitate the arrangement of other parts.

Preferably, in the present embodiment, the battery cell unit 2 includes a plurality of battery cells arranged in sequence. And a first buffer layer is arranged between two adjacent battery cells, and a second buffer layer 8 is arranged between the module end plate 1 and the battery cell unit 2. In specific implementation, the first buffer layer and the second buffer layer 8 can be aerogel layers commonly used in the prior art, and can play a good role in buffering, and meanwhile, the connection between the end plate and the cell unit 2 and between two adjacent cells is facilitated.

Of course, the provision of both the first buffer layer and the second buffer layer 8 is only a preferred embodiment in the present embodiment, and the provision of only the first buffer layer or the provision of only the second buffer layer 8 is also possible. In addition, the first buffer layer and the second buffer layer 8 in this embodiment may be aerogel layers, or may be other materials with buffering and energy absorbing functions commonly used in the prior art.

The battery module of this embodiment is convenient for better absorption external impact's energy through being provided with the portion of collapsing 5 to weaken the effect of external impact to electric core unit 2, better protect electric core unit 2. And divide into a plurality of sections that collapse of arranging along the length direction interval of module end plate 1 through the portion of collapsing 5, be convenient for reduce the destruction scope of external impact, when reducing the influence to electric core unit 2, convenient follow-up restoration.

Example two

The present embodiment relates to a battery pack in which the battery module of the first embodiment is provided, and the mounting bracket 3 is connected to the lower case 16 of the battery pack. In practice, the mounting bracket 3 and the lower housing 16 may be connected by a connection means commonly used in the art, such as welding.

As a preferred embodiment, as shown in fig. 1 and 2, in the present embodiment, a third buffer layer 9 is provided between the battery cell 2 and the lower case 16. It can be appreciated that by providing the third buffer layer 9 between the cell unit 2 and the lower case 16, the third buffer layer 9 can effectively absorb the load vibration transmitted from the lower case 16, thereby better protecting the cell unit 2.

Also, in the present embodiment, the third buffer layer 9 is preferably an EPP (expanded polypropylene) material layer, so as to be convenient for acquiring and better absorb the impact energy transferred from the lower housing 16. Of course, the provision of the third buffer layer 9 as an EPP material layer is only a preferred embodiment, and in addition, the third buffer layer 9 may be made of other materials having buffer properties commonly used in the prior art, such as EPE (expandable polyethylene) and the like. In particular, structural adhesive is disposed on the upper and lower surfaces of the third buffer layer 9 to facilitate connection with the cell unit 2 and the lower case 16.

The battery pack of this embodiment is convenient for promote battery pack shock resistance and the security performance of battery pack through being equipped with the battery module of embodiment one.

Example III

The present embodiment relates to a vehicle provided with the battery pack of the second embodiment.

The vehicle of the embodiment is beneficial to improving the safety performance of the vehicle and the satisfaction degree of customers on the vehicle by the battery pack of the embodiment two.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims

1. A battery module, characterized in that:

the battery cell module comprises a battery cell unit, module end plates arranged on two sides of the battery cell unit, and a mounting bracket and a crumple part which are arranged on the module end plates;

2. The battery module according to claim 1, wherein:

the crumple part extends along the length direction of the module end plate;

3. The battery module according to claim 2, wherein:

the crush part is provided with a notch which is used for dividing the crush part into a plurality of crush sections which are arranged at intervals along the length direction of the module end plate.

4. The battery module according to claim 1, wherein:

and one side of the module end plate, which is far away from the battery cell unit, is provided with a weight reduction groove.

5. The battery module according to claim 4, wherein:

a transverse reinforcing rib and/or a longitudinal reinforcing rib are arranged in the weight reducing groove;

6. The battery module according to claim 4, wherein:

the battery cell unit comprises a plurality of battery cells which are sequentially arranged;

7. A battery pack, characterized in that:

the battery pack is provided with the battery module as claimed in any one of claims 1 to 6, and the mounting bracket is connected with the lower case of the battery pack.

8. The battery pack according to claim 7, wherein:

and a third buffer layer is arranged between the battery cell unit and the lower shell.

9. The battery pack of claim 8, wherein:

the third buffer layer is an EPP material layer.

10. A vehicle, characterized in that:

the vehicle is provided with the battery pack according to any one of claims 7 to 9.